Refrigerating-machine



- A. L. GIBBS.

REFRIGERATLNG MACHINE.

APPLICATION FILE'P NHL 9. 191a.

Patented J 11116 29", 1920;

ATToRpgEY UNITED STATES. "PATENT OFFICE.

.ALONZO L. GIBBS, or WAGONER, OKLAHOMA;- A ss enon 0F ONEQHALF. To MUNCH, or WAGONER, OKLAHOMA.

REFRIGEeATmG-M QHINE.

Application fi1ed"March 9,

To all whom it'may concernn KBe it known that I, ALoNzo L. G BBs, a citizen of the United States, residing at Wagoner, in the county of, Wagoner and State ,of Qklahoma, have invented certaln new and' useful Improvements in Refriger- I ting-Machinesof which the following is a- "specification.

This invention has relation to the art of' refrigeration, and has for an ob ect to provide a refrigerating system designed partic-- ularly for use in small refrigerators, and to that end comprises a minimum number of parts of an inexpensive character perm 1tting the economical construction andmaintenance of the system.

Another object of the invention is 'to pro-g tween the generators-and consists of a furvide' arefrigerating system embodying the direct expansion principle and including a pair of generators for generating ammonia gas, one generator adapted to contain a rich liquor and the othera Weak liquorwith condenser and other appurtenant parts of the refrigerating system connected thereto Whereby the gas may be driven from the generator containing the IlCll -l1quo r' and subsequently absorbed. after expansion 1n the generator containing the, weaker liquor.

" ]Another object of the invention is to pro-.

'vide a refrigerating system embodying a j pair-of generatorslof the character above set forth and means wherebyeither generator alternately or simultaneously may be heated for the purpose above set forth.

A- 'still further object of the invention is 'toprovide a refrigerating system of the direct expansion type embodyinga generator,

rectifier. condenser. separator; and expansion coils, connected in a manner to permit a cyclic or continuous operationof the system and a cooling system extending through the various elements thereof and operableto progressively cool the elements during the flow of fluid from one end of the system to the other. e I

In addition to theforegoing my inven 'tion comprehendsimprovements in the details'of construction and arrangement of the parts to be hereinafter more fully described and particularly set forth in the appended claimg. i

Inthe accompanying drawings in which similar and corresponding ,parts are designated by the same characters of reference nected 'at' points 1918. Serial No; 221,460.

throughout the several views .in which they PP Figure 1, 1s a diagrammatic view illustrating the various elements of my improved refrigerating systemand their association, and

F ig. 2, is a diagrammatic view illustrat ing the connection to the heating coil.

condensing and expansion elements of' the system will be considered first and subsequently the method of coolingthe same. Therefore, with reference to the drawings, 10 and 11 indicate a pair of generators in the form of tanks, vertically in small systems and horizontally v1n larger systems. A heater is located benace 12 having 'avvertical'coil 13 located therein. The upper endof the coil is connected to pipes 14' and 15 which lead to the upper ends of. the tanks'lO and. 11 respectively while'the lower end of the coil 13 is connected to pipes 16 and 1-7 which lead to the lower ends of the tanks 10 andll re- "spectively. The pipes 16 and 17 have valves 18 and l9 interposed therein; The lower ends of the generators-10 and 11 are connected by means of a pipe.20 which is formed with an upper bend having valves 21 and 22 located therein adj acent the points of connection *of said connecting pipe with t the generators 10 and 11 respectively, drain cocks being also located in said pipe adja- Ce inglocated in the pipe. connections, two in. each connectlon, one at each side of the gage 26 whereby superposed valves at one side of the gage may be closed and the other superzposed valveS'QP to indicate the height of the fluid in one generating tank or the other'as the case maybe, Vertical pipe sections 28 and-29 are connected to the upper ends of the tanks 11 and 12 respectively, and continuations ofsaid pipe connections are extended horizontally in opposite directions s aifieati on'of Letters Patent. Pate t d June 29 1920 a The various elements of the generating,

which may be disposed as indicated at 30 and 31 respectively. The

and 34 located in its ends to control the generators 10 and 11 respectively. A T-cou- 'pling 35 is located in the pipe connection 32 a a point intermediate its ends and to one branch ofthe T-coupling there is connected a pipe connection 36 leading to a rectifier 37 consisting of a vertical coil of piping, the pipe connection leading to the upper end thereof. To the lower end of the coil 37 there is connected a pipe connection 38 leading to a separator 39 consisting of a vertically disposed tank,-the connection 38 entering the same at a point intermediate its ends. A pipe connection 40-is established at the upper end of the separator 39 and leads into the upper end of a condenser coil 41. A hand or expansion valve 42 is interposed in said connection 40 as is also a purge valve 43. The lower end of the vertical condenser c'oil 41 extends into a tank 44 to collect anhydrous ammonia, and a valve 45 is locatedin the coil 41 at a point adjacent its point of entrance into the tank 44. A pipe connection 46 is established at the lower end of the tank 44 and leads upward and into an expansion coil '47 which may be located in a refrigerator or any other compartment to be cooled. An-expansion valve 48 is located in said pipe connection before its connection to the coil 47, and a valve 49 is also located in the pipe connection at a point adjacent the point of connection to the tank 44. The opposite end of the-coolingcoil is then extended downwardly as at 50 and provided with a T-coupling 51 at a point intermediate whereby a pipe connection 52 may be established between said T.-coupling and the lower end of the separator 39. A valve 53 is interposed in connection 52 as shown.

' will next be considered. A'pipe 55 extending from a source of cool water is led into the lower end of the anhydrous ammonia tank 44 without connection to the interior the inner sides thereof and effects an exit at its upper end and is connected to a pipe connection 60. This pipe 'connection leads downward and is connected to a sleeveGl which surrounds the'horizontal portion 30 of the pipe connection of the generator tank 11, said sleeve being in spaced relation to said horizontal pipe section to define an annular chamber. .One end ofthe sleeve 61 is connected by means of a connection 62 to a similar sleeve 63 surrounding the horizontal portion 31 of the pipe connection to the generator tank 11. .T he opposite end of the sleeve 63 is then connected by means of a short pipe connection 64 to a horizontal pipe connection 65 located above and extending between the generator tanks 10 and 11. A T-coupling 66 is located at a point intermediate the ends of the pipe section 66'for connection to a pipe 67 which conducts away the water to a sewer. The ends of the pipe connection 65 are then extended into the generator tanks 10 and 11 and connected to coils 68 which are located therein and are extended throughout the length thereof, the lower ends of the coils effecting an exit through the lower ends of the tanks 10 and 11 and zu a'ovided with valves 69, controlling communication between said coils and pipe connections 70. The pipe connection" 65 is also provided with valves 71 at points 'adjacent the point of connection of said nace is then heated by-gas, charcoal or other suitable fuel, and the valve 19 closed, and the valve 18 opened. The aqueous ammonia in the tank 10 is then permitted to circulate through the heating coil and the gaseous ammonia is quickly driven off. Prior to the charging of the system however, it is necessary that the entire system beexhausted of air to the highest degree of vacuum practicable. If the ammonia in the tank 10 is heated, the valves 33 must be open, the valve 53 closed, and the valve 42- open. The heating of the aqueous ammonia is continued until the pressure within the system rises to approximately 100 lbs. per square inch, and the valve 54 controlling the supply of water to the coil 56 is open, per mitting the cooling fluid to flow through said coils 56, the pipe connection 58,.the coil 59 of the rectifier 37, the pipe connection 60, sleeves 61 and 63, passingthrough the connections 64 and 65, effecting an exit through the connection 67. The valve 71 should he closed so as to prevent the passage of water through the coil 68 of the generato water of condensation is collected.

tank 10. The other valve '71 however may be open to permit the fluid to pass through the coil 68 of the generator tank'll inasmuch asit is essential that the weak liquor be retained at a low temperature. The gase-1.

ous ammonia passing from the generator 10 through the pipe connections 28, 30, 32, and 36 to the rectifier 37 is subjected to a preliminary cooling in said rectifier and is I then passed into the separator 39 where gaseous ammonia is then conducted into the condenser 41 and ow1ng to the combined action of the cooling fluid and the pressure in the system induced by the heat of the ducted through the returns 50 into the pipe connection 20' and owing. to the fact that the valve 21 is closed, and the valve 22 is v open, the gas is permitted to enter the weak liquor inthe tank 11 and is quickly absorbed. This process continues until the strength of the liquor in generator 10 is reduced to 5% and the strength of the liquor in tank 11 increased to approximately 30% when the valve 18 is closed and the valve 19 opened so that liquor in the tank 11 may be heated. Other valve adjustments which are obvious must yet be made to properly conduct the cooling fluid and the process of generation will continue in the tank 11 in the same manner as that just described.

Thus it will be seen that I have provided a refrigerating process which is cyclic or continuous in its action in that the absorp-' tion of gas takes place automatically without requiring the interchange of liquors of various strengths after the system has once been charged. Other uses and advantages of this system will readily occur to those fa- The miliar with the artto which this invention appertains. use the coils in the generator tanks and in the anhydrous ammonia tank 44 will be eliminated.

While I have illustrated and described my invention with some degree of particularity, I realize that in practice various alterations thereover may be made, and I therefore desire to reserve the right and privilege of In small plants for domestic changing the form of the details of construction or otherwise altering the arrang'ement of the correlative parts without departing from the spirit of the invention or the .scope ofthe appended claim.

Havingthus described my invention what I claim as new and desire to secure by Letters Patent is I p In a refrigerating system. a pair'of generating tanks having their lower ends provided with a connecting pipe connecting the interiors of the tanks, a heating coil,.con nections between the upper end of the coil and the upper ends of the said tank, horizontally disposed pipes arranged above the tank and eachhaving one end communicating with one of the said tanks, a condenser coil, and an expansion coil, a pipe connecting the said expansion coil with the said con-.

necting pipe for. the said tanks, a separator having connection with the said last mentioned pipe and connected with the said condenser coil, a supply pipe connected to a source of cool water supply, a tube connecting with the said supplypipe and surrounding the said condenser coil, and having one end at the top of the condenser coil equipped with a pipe extension leading from the said tube, a rectifier, the said pipe from the upper end of v the tube extending through the length of the coil of the said rectifier in spaced relation to the inner sides thereof, and sleeves surrounding the said horizontally disposed pipes and, connected tothe said tube surrounding the said rectifier coil.

In' testimony whereof I aflix my signature in presence of two witnesses.

ALONZO L. GIBBS. Witnesses:-

E. CHAPMAN, 'J. A. BARAK. 

